Ok first off i gotta say my english sucks.
Well here is the problem :
This is my PC spec
Radeon 6950 XFX
AMD Phenom II X4 955 BE
Motherboard Asus M5A78-Plus
8GB RAM DDR3 1600 Dual Channel
500Watts Thermaltake PowerSupply
I play Dragon nest and League of legends a lot, but i'm always laggin...